Cloth-cutting machine.



P. J. CLARK. CLOTH CUTTING MACHINE.

APPLICATION FILED DEC. 19, 1911.

1,051,686, Patented Jan. 28, 1913.

2 SHEETS-SHEET 1.

F. J. CLARK.

CLOTH CUTTING MACHINE.

APPLICATION FILED DEC.19,1911. 1 ,051,686. Patented Jan. 28, 1913.

2 SHEETS-SHEET 2 21 z ariz 65/0.

UNITED STATES PATENT OFFICE.

FREDERICK J. CLARK, 0E BUFFALO, NEW YORK, ASSIGNOR 'ro EASTMAN MACHINECQIIIPANY. OF BUFFALO, NEW YORK.

cno'rn-cu'r'rmc MACHINE.

Specification of Letters Patent.

Patented Jam 28,1913.

Application filed December-19, 1911. Serial No. 666,681.

To all whom it may concern L' Be it known 'that'I,

New Ytork, have (if which the following is aspecification.

This invention relates more" particularly to improvements in clothcutting machines of that type in which a driven rotary knife is employedfor cutting the cloth, and has es ecialreference with which the machineis provided for sharpening the knife.

The ob'ect of this invention is to construct a cloth 0' tting machine ofthis type having a simple and eflicient knife sharpening device whichnormally stands out of e gagement with the knife in a position where it.does not interfere withthe operators View.

of the cutting edge of the knife and the.

front of the same; and which engagement with the opposite sides patternin canbe easily'x'noved into the knife and will engage ofthefcuttingedge thereof with an equal pressure and w'illsharpen the saine infaneven; and uniform manner circumference of the. knife; and iustable'relative to the knife to conform to the knife. in-the accompanyingdrawing, consisting of two sheets: Figure 1 is-a side elevation of'acloth cutting machine provided with a sharpening device. embodying theinvention.

" Fig-Bis a fragmentary side elevation ther'eof, on an enlarged scale,showing the sharpening device in engagementwith the knife. Fig. 3 is afragmentary front elevation thereof looking in the 3 in Fig. 2. Fig'. 4is. a longitudinal section throughone of the grinding members. 5'is afragmentary f ,machine' looking in the direction 0 the arrow 5 in Fig.

position. Fig. 7

ening device in its raised line '7 7, Fig. 6.

is a sectional elevation'in -Fig. 8 is a rear elevation vof thesharpening,

to the sharpening means.

throughout the which is ad-.

direction-of the arrow M Fig. ront elevation of the.

p 2: Fig. 6 i'sa -fragmentary" front elevation thereof showlngthe sharpmachine having ,a

- showing the sharpening device in its raised FREDERICK J. CLARK,a'citizen' of the United States, residing at Buffalo, in the county ofErie" and Stateofinvented a new and useful Improvement, in Cloth-CuttingMachines,.

position.

Like reference characters refer to like parts in the several figures.

The cloth cutting machine shown is! a rotaryiknife machine of standardtype and comprises a base plate A, a standard-B secured thereto, a frameC adjustable on the standard, a rotary knife D,=the cutting edge ofwhich is beveled on its opposite sides in the usual manner, and a motorE which is car ried by t he frame and is connected' with the knife by.suitable driving gears. All of theseparts are common in rota knifemachines. and may be of any suitable and proper construction.

The present invention'relates' to the-knife sharpening device of themachine, and this,

in general terms,'. consists .of .two rotary] grinding disks or wheelswhich are supported from the frame of thejm-achine in such'a manner thatthey-normally'stand at one side .of the knife where they do.not'interfere with the operators view of the. knife and the pattern,

unison 'into engagement with the.opposite sidesof the cutting edge .ofthe knife and to bear with equal pressure .-ther'eon, thus 'producing-an even and uniform grinding of the knife edge on both sidesthereof and prebut are adapted to be moved in serving the alinement oftheedge through the circumferencqof the knife- I In the particularembodiment of the in ,vention shown, disks or wheels, which are of usualconstruc tion, comprising a back f to which is secured an annulargrinding face or ring'- f of emery or other suitable abrasive material,and G G represent pivotal supporting arms to which the disks F F may esecured in any suitable manner. As shown, each arm is provided at itsouter or free end with an offset portiong through which extends abolt 9'having screwthreaded engagement therewith. The bolt g is provided at itsinner end with a shoulder g and a reduced end portion 9 upon which isscrewed a bushing 9 having a reduced bearing portion andan end shoulden'The grinding disk is journaled on the bearing portion of the bushing 'qbetween the end shoulder thereon and a washer on the bolt g which abutsagainst the shoulder g3 By turning the bolt 9', the grinding disk can beadjusted axially relative to.the. offset 9 of the supporting arm F Frepresent the grinding and a suitable lock nut 9 may be provided forsecuring the boltin its adjusted position on the arm. The support-s forthe grinding disks are so arranged that when the disks are-in engagementwith the edge of the knife each disk will be slightly inclined to thevertical plane of the knife, and the grinding fa ceof the disk will beinclined to correspond with the beveled sides of the 'knife edge.

The knife traveling across the engaging face of the disk will produce arotary motion of the disk but in a direction at an angle to the rotationof the-knife so that the engaging face of the disk will effectivelygrind the edge of the knife.

The arms 'G Gniay be pivotally secured to the frame of the machine aiidfperatively -m unison in any suitable manner.

.i'acc ofthe plate pom'iected together so that they will I bolt 7'(Figs. '8 and 9 which extends through the slot h aan d' hasscrewthreaded engagement with the plate I. The stationary plate II has aguide channel 71' in the outerface thereof and the adjusting plate I hasa rib fected. but any other suitable means. for ad- 'a'? .(Fig. 3).which engages therein for guiding the'adjustin platein its movements onthe stationary plate. For effecting this adjustment of the pl'ate I, itis provided with a lateral earor lug kin which is mountedan adjustingscrew K which engages an-ear k on the bracket 12. A uniform adjustmentof the disk carrying arm -can'thus be easily-efjustably connecting thedisk and carrying arms to the frame may be employed if desired.

. The disk carrying arms are 'pivotally se en d to the adjusting plate Ias follows:

The arm G is provided with apivot pin or bolt-L which is journaled'in anopening in the plate I and extends through the slot h in the plate H andthrough an opening in "the end'of the arm Glwith which ith'asscrewthreaded engagement. The bolt L has a vshoulderl and is providedgbetween this shoulder and the inner face of the arm G. with aspacingsleeve Z. The outer end of this bolthas a nut Z [which engagesthe "but'er face of the arm G, andtlie. arm can :"Jthus be rigidly secured to 'the'bolt.

arm G'is secured to theplate I by a bolt M The which has screwthreadedengagement with the plate I at its inner end and is provided "with anannular flange or stop m between which 'and the face of the plate Ithere is journ'alecl a gearsleeve m to which one end of the arm issecured so that the sleeve and arm turn together. v

The disk carrying arms G and G are operatirely connected together in theconstruction shown in a very simple manner. The pivot L to which the armG is secured has an enlarged toothed head N which meshes with the teethof the gear sleeve m to which the arm G is secured. Thetwo arms willthus always move in unison inopposite directions and any force appliedto either arm will beat once directly communicated to the other arm. y

The pivoted arms G G are normally held sprin O which is secured to aprojecting end of the bolt M and engages the outer means may be employedfor this purpose,

carrying arms are such that" in their raised position they extend at oneside of the vergrinding disks carried by them d not interfere with theoperators view ofthe knife and the pattern.

P represents a handle which is secured to arms into their loweredposition in which their grinding disks'are in engagement with the knife,and the retaining of them in this position until the knife has beensharpened; Anyforc'e which is applied to the arm G during the sharpeningoperation will be grinding disks F and F will bear with equal pressureagainst'the opposite beveled sides of the cutting edge and grind thesame uniformly on both sides. Thelgrindon their supporting arms relativeto each other and to the sides of the khife which they engage, and thetwo disk carrying arms are adjustable together relative to thefframe andthe knife. This enables the device to be readily and carefully adjustedso that both grinding wheels will be in position for proper engagementwith the cutting edge of the knife and will simultaneously engage thesame and bear thereon with equal force. These adjustments are ample totake care of any-change in the size or p'osit-ion'of the knife "due towear or any adjustment-Zof'the pivoted to the same supporting plate,-their engaging gears will always remain'in mesh irrespective of' anyadjustment of their support relative to the" frame of the machine.

In FigslO. 11 and 12 is shown a modified construction in whichsharpening Wheels R R having peripheral sharpening surfaces 1' in araised position above. the knife by a tical plane of the knife wherethey and the the arm'G to facilitate the swinging of the end of the armG, but any other suitable The shape and arrangement of the diskcommunicated tothe arm G so that the ing disks or wheels are separatelyadj ustable knife. The disk carrying ar ms being both are employed inthe place of the sharpening disks F F., These wheels are mounted uponpivoted arms S' S which are adjustably secured to the frame of themachine .and

operatively connected together to swing in l unison and normally heldin. a raised 'posi-' in thesame manner as tion above the knife, the armsG G above described. The-wheels RR aresoarran'ged on the arms S Sthatwpen the wheels are in engagement with the In ife' their axes ex-tendsubstantially arallel'w'ith the vertical plane of the kni e at oppositesides thereof so that the periphery of tlie wheels will enga'get'heopposite .sides of'the. beveled edge of the knife. In this construction,as in the other, the grinding wheelsbear equally against :the oppositesides of thecutting edge. and grind the same evenly and uniformlythroughout its length.

In both constructions the sharpening device is of simple-and compactconstruction,

'quickly adjusted so that they will equally bination with a rotaryknife,

of the cutting. edge engage theopposite sides of the knife and canberaised'or lowered i'elative to the knifeto bring .them to. av properposition for en-- agingthe opposite beveled sides thereof.

I claim as my invention:

1. In a clot-h'cutting machine, the combination with a rotary knife, ofasharpening device therefor comprising opposed grinding members which aremovably mounted on the'frame of the machine and are 'adapted to be movedinto and out of sharpening engagement with the knife, and connectionsbetween said members which operate, when either member is moved ineither directiomto positively produce a simultaneous opposite movementof the other member, substantially'as set forth.

2. In a cloth cutting machine, the comof a sharpening device thereforcomprising opposed grinding members which are pivotally mounted on theframe of the machine to swing thereon in opposite out of engagement withthe opposite sides of the knife, and com 'nections between said memberswhich operate, when either member is moved into or out of engagementwith one side of said cutting-edge; to positively and simultaneouslymove the other member likewise into or out of engagement with theopposite side of said cutting edge, substantially as set,

forth;

- 3.1m a cloth cutting machine, the com- 1 opposite directions,

grinding members, supporting arms moved, and a suppo bers which aredirections into and opposite posite sides ofthe sharpening ledgebination with a rotary knife-, .of asharpen- .ing device thereforcomprising posed grinding members, supports for "sai member's. which arepivotally' mounted on the frame of the mach'ne-to swing uthereoninandconnect-ions between wh ch operate, 'when either.

said supports member is moved in eitherdirection, to produce a positiveand simultaneous movement of, the other member in an opposite.direction, substantially as set forth.

4. In a' cloth cutting machine, the-comb'ination with :a rotary knife,of a sharpen-- in device therefor, comprising opposed grinding members.supports for said members which are'pivotally mounted on the frame ofthe machine to swing thereon in oppo'site directions to move saidmembers into and out .of'engagement, with. the opposite sides of thesharpening edge of the knife, connections between said memberswhichop'erate, when either member is moved into or out of engagementwith one side of said cutting edge, to. likewise positively move theother memb'er into or out of engagementwith the oppositev side thereof,and means connected with one of' said'me'mbers for moving said membersinto and out of engagement with said cutting edges substantially as setforth. I p

5. Ina cloth cutting machine, the combinationwith a rotary knife, of asharpening device therefor comprising opposfed or said embers which aremovable in opposite directions tobring: said members into and out .ofsharpening engagement with the knife, connections between said armswhich operate to produce a simultaneous opposite movement-ofsaid armswhen. either-arm is rt, for said arms which is adjustably secured to theframe of the machine, substantially as set forth.

. 6. In'a clothcutting machine, the combin ation with a rotary knife, ofa sharpening device therefor comprising opposed grinding members,supports for said memmovab v frame of the machine and are unovablethereon to a position in which. said members have sharpening engagementwith said knife,

and to aposition in which said members stand above, and at one side o fsaid knife, and means for normally retaining said supports in said laststantially as set' forth.

7. In a cloth cutting machine, the coin-- of a sharpenv bination with arotary knife, i'ng device therefor comprising opposed grinding members.supports forsaid memf bers which are pivotally mounted on the frameof-the machine to swing thereon in directions to move. said members outof engagement with the onof the into and mounted on thementionedposition, sub;

said supports relative to each other and to the cutting edge oftheknife, and connec-' tions between said members which 'operate when onemember is moved in one direction to produce a positive and sim'ultaneousmovement of the other member in an opposite direction, substantially asset forth.

8. In a cloth cutting machine,, the combination with a rotary knife,of asharpening device therefor comprising opposed grinding members, separatearms on which said membersare journaled, a supporting plate to whichsaid arms are pivoted, means I for adjustably securing said plate to theframe of the machine, means for normally retaining said arms in a raisedposition with their grinding members out of engagement with the knifeand at one side of the vertical plane thereof, and connections betweensaid arms which produce a uniform movement thereof in oppositedirections to bring said grinding membersinto engagement with theopposite sides of the cutting edge of the knife, substantially as setforth.

Witness my hand, this 15th day of'December, 1911.

FREDERICK J. CLARK.

\Vitnesses.

EDW'ARD C. HARD, CYEs'm B. HORNBECK.

